Chapter 5 solutions - Fundamentals of Analytical Chemistry 8th ed Chapter 5 Chapter 5 5-1(a Constant errors are the same magnitude regardless of sample

Chapter 5 solutions - Fundamentals of Analytical Chemistry...

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Fundamentals of Analytical Chemistry: 8 th ed. Chapter 5 Chapter 5 5-1 (a) Constant errors are the same magnitude regardless of sample size. Proportional errors are proportional in size to sample size. (b) Random error causes data to be scattered more or less symmetrically around a mean value. Systematic error causes the mean of a data set to differ from the accepted value. (c) The mean is the sum of the results in a set divided by the number of results. The median is the central value for a set of data. (d) The absolute error of a measurement is the difference between the measured value and the true value. The relative error is the absolute error divided by the true value. 5-2 (1) Random temperature fluctuations causing random changes in the length of the metal rule; (2) uncertainties from moving and positioning the rule twice; (3) personal judgment in reading the rule; (4) vibrations in the table and/or rule; (5) uncertainty in locating the rule perpendicular to the edge of the table.
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